Fix: Prevent notification prompt from reappearing after timeout

**Issue:**
- Notification prompt kept reappearing after push subscription timeout
- Users stuck in loop when push notifications fail due to network restrictions

**Solution:**
- Auto-dismiss prompt on timeout errors
- Mark as permanently declined when timeout occurs
- Provide user-friendly error message
- Clean up error handling flow

**Technical Changes:**
- Check for timeout in error message
- Set both session and permanent dismissal flags
- Simplify error propagation from enableNotifications()
- Show concise error message for timeout scenarios

This fix ensures users in restricted network environments (VPNs, corporate firewalls, FCM blocked) won't be repeatedly prompted for push notifications that can't work.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

LittleShop/wwwroot/js/notifications.js

@@ -113,7 +113,17 @@ class AdminNotificationManager {
                 sessionStorage.setItem('notificationPromptDismissed', 'true');
             } catch (error) {
                 console.error('Failed to enable notifications:', error);
-                this.showNotificationError('Failed to enable notifications. Please try again.');
+
+                // Check if it's a timeout error - if so, dismiss the prompt
+                if (error.message && error.message.includes('timed out')) {
+                    promptDiv.remove();
+                    sessionStorage.setItem('notificationPromptDismissed', 'true');
+                    localStorage.setItem('pushNotificationDeclined', 'true');
+
+                    this.showNotificationError('Push notifications timed out. This may be due to network restrictions. The app will work without push notifications.');
+                } else {
+                    this.showNotificationError('Failed to enable notifications. Please try again.');
+                }
             }
         });
 
@@ -148,31 +158,13 @@ class AdminNotificationManager {
 
         } catch (error) {
             console.error('Failed to enable notifications:', error);
-
-            // Show enhanced error message with diagnostics
-            let errorMessage = '❌ Failed to enable push notifications.\n\n';
-
-            if (error.message.includes('timed out') && error.message.includes('FCM')) {
-                errorMessage += '🔗 Network Issue Detected:\n';
-                errorMessage += 'Your browser cannot connect to Chrome\'s push notification service (FCM). ';
-                errorMessage += 'This commonly happens with:\n';
-                errorMessage += '• Corporate firewalls or VPNs\n';
-                errorMessage += '• Network security software\n';
-                errorMessage += '• Restricted internet connections\n\n';
-                errorMessage += '💡 Workarounds:\n';
-                errorMessage += '• Try from a different network\n';
-                errorMessage += '• Disable VPN temporarily\n';
-                errorMessage += '• Contact your IT department\n';
-                errorMessage += '• Use a mobile hotspot to test\n\n';
-                errorMessage += 'The admin panel will still work normally - you just won\'t receive push notifications.';
-            } else {
-                errorMessage += `Error: ${error.message}`;
-            }
-
-            this.showNotificationError(errorMessage);
+            // Re-throw so the caller can handle it
+            throw error;
         } finally {
-            button.disabled = false;
-            button.innerHTML = originalText;
+            if (button) {
+                button.disabled = false;
+                button.innerHTML = originalText;
+            }
         }
     }